Method of constructing and connecting artificial teeth.



citizen of the at th gum line 23 canal 22.

generally made of porcelain, is r STATES PATENT ion.

HENRY J. WARREN, OF BAYONNE, NEW JERSEY.

Specification of Letters Patent.

Patented Feb.25, 1919.

Application filed August 11, 1916. Serial No. 114,337.

To all "whom, it may coacernr Be it known that I, HnxnYJ. \VARREN', a United States, and a resident of Bayonne, inthe county of Hudson and State of New Jersey, have invented certain new and useful Improvements inv Methods of Constructing and Connecting Artificial Teeth, of which the following is a specification.

This invention relates to the method of constructing and connecting an artificial tooth.

In the accompanying drawings Figure 1 represents a side elevation of the crown, tooth and its root, with a section through the gum in which the crown is held; Fig. 2

shows a. front view of the elements of Fig. 1 Fig. 3 is a. section as on the line 3, 3 oi. Fig. 2, and 'Fig. 4 represents a side view of an :antifieial tpoth.

tiIn the, gum 20 is represented the tooth root 21 with its canal 22. The root is cut otl and covered with the capping 28, having the peripheral flange 29. A hole30 is drilled in the canal 22 of the root. A pin extends through the hole 30 into the canal The pin 32 'loosely enters the hole 30 and said A backing is shown with the legs 35 and 36, the latter having formed therein the opening 37. The backing is located with its opening loosely engaging the pin 32 and the outer end of the leg 36 is brought to bear against tI.e front portion of the lower face of the capping 28, so that a clearance s nice 38 is formed between the rear portion of the leg 36 and-the rear portion of the capping 28. The facing or tooth proper 39. which is presented w th the dart ecip'face 40, fiat rear face 41, the crowned front 42 and the opening 43.

The facing is placed on the backing with its top face 40 hearing against the-lower face of the leg 36 and its rear face 41 hearing against the inner face of the leg 35; The opening 43 of .the facing is loosely engaged by the lower end of the pin The leg 36 extends over the whole area of thetop' face 40' of the tooth 39, and th leg 35 extends over the whole areaw-ofthe rear face 41 of said tooth.

The backing having the legs and 36 Withthe tooth 39 are now adj nsted in proper position. Wax is applied between the capmetal like the capping coaxial with hole with metal,

the tooth on backing and ping 28 and the leg 36 of the backing as indicated at 45, to temporarily hold the capping 28, backing and pin 32 together.

he capping 28, the backing and pin 32 while heldtogether by the wax 45 are care fully removed from the root 21. The tooth 39 is next removed from the backing.

The capping, backing and pin are. invested on the front and sides. the vax 45 is melted or washed out with hot water and the space between the capping and backingfilled with gold by means of a blow pipe for the full length of the backing as indicated at 48. fter the parts are cooled the investment is removed. -The capping and backing, wihich together I all the crown, are then pickled, ground and finished. The capping is now fitted on the root to prove the fit. then taken off and the root and canal are-washed with pure alcohol. The tooth 39 is next cemented on the leg 35 of the, backing, and at the same time the pin 32 is cemented into the opening of the said tooth 39 and canal 32.

Having described my invention what I desire 'to secure by Letters Patent and claim is:

The method of connecting an artificial tooth consisting in cutting a. root to the gum line, fitting a capping on the root,

in the capping coaxial with the canal of the root, inscnting a pin through the capping into the root and fitting loosely therein, locating a-backiug against the capping with an opening in the backing engaging said pin, locating a. tooth on the backing with the pin projecting into a hole of the tooth. adjusting the tooth and backing to its proper angle, applying wax to all the elements, withdrawing all elements from the root, sliding the tooth from backing, investing the parts.

Washing out the wax, soldering the parts removing the investment when cooled, pickling. grinding and finishing the. metallic element-s, inserting the crown to root as proof of fit. taking off the crown, Washing the root and canal thereof )with pure alcohol, drying the elements, cementing cementing the pin in )lacc.

iiign'ed at Bayonne, in the county of Hudy son and State of New Jersey, this 21st day of July. A. D. 1916.

HENRY J. WARREK.

Witnesses:

A. A. on BoNNnvILnE, Ernm, E. human.

drilling a 

